Nation She started planting seeds at age 3. Now, this 6-year-old is the youngest certified farmer in Georgia. October 6, 2021Asha C. Gilbert, USA TODAYComments Off on She started planting seeds at age 3. Now, this 6-year-old is the youngest certified farmer in Georgia. Kendall Rae Johnson is 6 years old and she's already a certified farmer in Georgia. She even has her own business.